Method of making a transfer



April 30, 1957 R. H. WHARTON METHOD OF MAKING A TRANSFER- mea Sept. 27.1952 INVENTOR.

RICHARD H. WHARTON w p New ATTORNEY fi'nited States Patent METHOD OFMAKING A TRANSFER Richard H. Wharton, Dayton, Ohio, assignor to TheStandard Register Company, Dayton, Ohio, a corporation of OhioApplication September 27, 1952, Serial No. 311,902 Claims. (Cl. 154-121)This invention relates to transfer devices for use in manifoldstationery.

The object of the invention is to simplify the construction as well asthe method of manufacture and mode of use of transfer material, wherebysuch material may not only be economically manufactured, but will bemore eificient and satisfactory in use, adaptable to a wide range ofapplications, and have a relatively long and useful life.

It is a further object of the invention to improve over present carbontransfer devices by providing a transfer medium of relatively longerlife and capable of producing a greater number of legible impressions.

Another object of the invention is to control the amount of transfermaterial applied to underlying sheets with the view of making the amountof material transferred substantially uniform over the life of thetransfer device.

A further object of the invention is to prevent smudging of paper inoverlying relation to the transfer device, and to reduce wear on thedevice caused by impressions made thereon with a pencil, pen orimprinting device.

Still another object of the invention is to produce a generally newfabricated transfer device having multiple laminations of wax, absorbentpaper and plastic film, all united in a unitary Web.

Another object of the invention is to avoid the entrapment of air inapplying the plastic film to the absorbent paper.

A further object of the invention is to provide transfer materialpossessing the advantageous features, the inherent meritoriouscharacteristics and the method of manufacture herein mentioned.

With the above primary and other incidental objects in view as will morefully appear in the specification, the invention intended to beprotected by Letters Patent consists of the features of construction,the parts and combinations thereof, and the mode of operation, ashereinafter described or illustrated in the accompanying drawings, ortheir equivalents.

Referring to the drawing, wherein is found the preferred but obviouslynot necessarily the only form of embodiment of the invention,

Fig. 1 is a fragmentary view in cross section of the transfer device inaccordance with the illustrative embodiment of the invention;

Fig. 2 is a diagrammatic view of one process for applying orimpregnating the absorbent paper with ink;

Fig. 3 is a diagrammatic view of another method of impregnating htepaper with ink;

Fig. 4 is a diagrammatic view of still another method of impregnatingthe paper with ink;

Fig. 5 is a diagrammatic view showing a method of coating one side ofthe inked paper with wax;

Fig. 6 is a diagrammatic view showing a method of applying the plasticfilm to the inked and waxed absorbent paper; and

Fig. 7 is a detail view, partly diagrammatic, showing a method ofcurling the plastic film prior to its application to the absorbent paperto secure a progressive lateral engagement of the film with the paper.

. fer device being the side through which impressions are transmitted.On the opposite side of the transfer device,- or that side receiving theimpression to be transmitted, is a layer or lamination 12 in the form ofa sheet or web of cellophane, cellulose acetate or other plastic film.

The wax coating 11 is permeable but functions as a flow retarding mediumwith respect to the inkcontained in the paper 10. The wax coat preventsbleeding ofthe ink-impregnated paper which is the cause of smudging ofunderlying record sheets. At the same time, the-wax coating regulatesthe amount of ink transmitted to suchunderlying record sheets so thatwhen first used, or first subjected to writing pressure, an excessamount of ink is not transferred or permitted to flow to the underlyingpaper.

paper. erted in correspondence with and in proportion to the needtherefor.

The plastic film 12 provides a non-permeable coating on the top side ofthe transfer device whereby to prevent smudging of overlying recordsheets, and to reduce wear caused by writing on the ink impregnatedpaper 10.

The manufacture of the transfer device may take place in a series ofmethod steps, for example as illustrated in Figs. 2 to 7. Thus, Fig. 2shows one method of impregnating the absorbent paper 10 with ink.According to this method step, a web of paper 10 passes over a coatingroll 13 having a rotatable mounting in an ink fountain 14, thence aroundan idler roll 15 and between squeeze rolls 16 and 17, the latter ofwhich rotates in another ink fountain 18. Rod scrapers 19 and 21 arelocated immediately beyond the respective fountains 14 and 18 and removeexcess ink from the paper surface.

Another method of inking the paper web 10 isshown in Fig. 3. over acoating roll 22 in an ink fountain 23, the direction of rotation of thecoating roll 22 being opposed to the direction of movement of the web.Pressure rolls 24 and 25 hold the web in contact with the roll 22 and arod scraper 26 removes excess ink. According to this con struction ofimpregnating the paper strips, the ink content of the paper is regulatedby increasing or decreasing of the speed of the coating roll 22.

Still another method of coating the paper web is shown in Fig.4. Here,the web is passed through a bath of ink 27 around a roll 28, followingwhich pressure is applied to the web in squeeze rolls 29 and 31 toremove excess ink.

The paper web 10 having been impregnated with ink according to any ofthe above described methods, then has the Wax coating 11 appliedthereto, as in the method shown in Fig. 5 wherein the strip or web 10passes over a coating roll 32 rotating in a bath 33 of molten wax. Theexcess wax is removed by a knife scraper 34, such scraper being adjustedto leave a wax coating on the web 10 not exceeding a proportion of threeto four pounds of wax per ream of paper.

The plastic film or Web 12 is prepared in the form of a continuous webcorresponding approximately to the web it). In applying the plastic filmto the paper Web Continued writing removes the wax coating concurrentlywith the depleting of ink in the impregnated- Thus, the protectiveinfluence of the wax is ex- According to this method the paper is passed10, the separate webs and 12 are unwound or caused to move in adjacentapproximately parallel paths having a point of convergence. At thispoint the webs assume an intimate, contacting, superposed relation, inwhich condition the assembly so defined is passed through or around aseries of rollers 35, 36 and 37. The plastic film thereby is fixed tothe inked and waxed paper with sulficient firmness to allow hal'dlingand cutting of the resulting laminated structure as a unitary transferdevice.

Fig. 7 illustrates a detail of the application of the plastic film web12 to the paper web 10. Thus, the paper web 10 passes about a roll 38and extends in a generally horizontal position beneath the plastic filmweb 12. The latter descends on the paper web 1.0 to make contacttherewith, and just prior to such contact passes through a guide loop 39which tends to raise the side edges of the web 12, in effect curlingsuch web about its longitudinal axis. As a result, as the plastic filmweb 12 descends upon the paper web 10, the center of the plastic filmweb 12 descends upon the paper web 19, the center of the plastic filmstrikes the paper first and further lateral engagement of the film withthe paper is a progressive action which starts at the center and extendsgradually to the side edges. By applying the plastic web to the paperweb in this manner no opportunity is afforded for the entrapment of airbetween such members. Since the plastic web 12 engages the paper web 10progressively in an axial sense, it may broadly be considered to have acompound motion whereby a contact is effected between the plastic andpaper webs which is progressive both in a lateral and an, axial sense.

It will be understood that while the instant transfer device may haveits principal utility in manifold stationery wherein it is made up as apart of a manifold set or assembly, such devices may be cut and formedfor use as general utility carbon paper.

From the above description it will be apparent that there is thusprovided a device of the character described possessing the particularfeatures of advantage before enumerated as desirable, but whichobviously is susceptible of modification in its form, proportions,detail construction and arrangement of parts without departing from theprinciple involved or sacrificing any of its advantages.

While in order to comply with the statute the invention has beendescribed in language more or less specific as to structural features,it is to be understood that the invention is not limited to the specificfeatures shown, but that the means and construction herein disclosedcomprise but one of several modes of putting the invention into effect.

Having thus described my invention, I claim:

1. A method of making a laminated transfer device for use in manifoldstationery, including the steps of saturating an absorbent paper withink, applying to the underside of said paper a flow metering permeablewax coating, applying to the topside of said paper an impermeableplastic film, curling said film transversely of its length and thenreleasing said plastic film immediately prior to contact application tothe paper, and passing the device so formed through rollers to fix thefilm upon the paper with sufficient firmness to allow handling andcutting of the device as a unit and to provide a transfer device with aconcurrent proportionate controlled depleting of the flow metering waxcoating and the ink stored in said paper in use.

. 2. A method of applying an impermeable plastic film to a strip ofpaper, characterized by the step of guiding the plastic film over and tothe paper raising the side edges of the plastic film to effect alaterally curved condition of the film just prior to contact of the filmwith the paper so that the center of the film engages the paper firstfollowing which the sides of the film are released and engage the paperin a laterally progressive movement in self induced fashion.

3. A method of making a transfer device, including the steps ofpreparing continuous webs of absorbent paper and impermeable plasticfilm, impregnating said paper web with a transfer material, unwindingsaid webs in adjacent converging paths so as to apply said plastic filmto one side of the paper, and curling one of said webs prior to itsengagement with the other web, then releasing said one web to make aself induced automatic progressive lateral contact with said other webavoiding the entrapment of air between the webs said one webautomatically scaling to the other in the process.

4. A method of making a transfer device for manifold stationery,including the steps of preparing continuous webs of absorbent paper andof impermeable plastic film, impregnating said paper web with a transfermaterial, inducing a flow retarding medium on said impregnated paper,unwinding said webs in adjacent converging paths whereby to direct saidfilm to one side of said paper progressively in an axial sense, andcurling one of said webs prior to its engagement With the other web tomake the central axial portion thereof initially engage said other web,said one Web for automatic self induced recovering thereof forprogressive contact with the other web in a lateral as well as axialsense.

5. A method of making a transfer device for use in manifold stationery,including the steps of preparing continuous webs of uncoated absorbentpaper and of impermeable plastic film, impregnating the paper web with atransfer material, inducing a flow retarding medium on said uncoatedpaper, unwinding said webs in adjacent converging paths whereby to applysaid plastic film to said paper as a backing, and imparting to one ofsaid webs a transversely curved configuration and then a release thereofimmediately prior to contacting application to the other web toautomatically induce a compound motion to effect a self induced sealingcontact between said webs which is progressive in a lateral as well asan axial sense.

References Cited in the file of this patent UNITED STATES PATENTS1,700,415 Neidich Ian. 29, 1929 1,864,097 Sherman June 21, 19321,968,095 Poschel July 31, 1934 1,986,954 Abrams et a1. Jan. 8, 19352,040,564 Rapley May 12, 1936 2,084,221 Schutz June 15, 1937 2,263,196Stolle et al. Nov. 18, 194] 2,306,046 Duggan et al Dec. 22, 19422,325,584 Barnhart Aug. 3, 1943 2,340,452 Child et 'al Feb. 1, 19442,408,147 Kneale Sept. 24, 1946 2,501,495 Carroll et al. Mar. 21, 19502,528,168 Paulsen Oct. 31, 1950 2,598,892 Critchlow et a1. June 3, 1952FOREIGN PATENTS 399,578 Great Britain Oct. 12, 1933

1. A METHOD OF MAKING A LAMINATED TRANSFER DEVICE FOR USE IN MANIFOLDSTATIONERY, INCLUDING THE STEPS OF SATURATING AN ABOSORBENT PAPER WITHINK, APPLYING TO THE UNDERSIDE OF SAID PAPER A FLOW METERING PERMEABLEWAX COATING, APPLYING TO THE TOPSIDE OF SAID PAPER AN IMPERMEABLEPLASTIC FILM, CURLING SAID FILM TRANSVERSELY OF ITS LENGTH AND THENRELEASING SAID PLASTIC FILM IMMEDIATELY PRIOR TO CONTACT APPLICATION TOTHE PAPER, AND PASSING THE DEVICE SO FORMED THROUGH ROLLERS TO FIX THEFILM UPON THE PAPER WITH SUFFICIENT FIRMNESS TO ALLOW HANDLING ANDCUTTING OF THE DEVICE AS A UNIT AND TO PROVIDE A TRANSFER DEVICE WITH ACONCURRENT PROPORTIONATE CONTROLLED DEPLETING OF THE FLOW METERING WAXCOATING AND THE INK STORED IN SAID PAPER IN USE.